The reform of medical service system integration in counties and towns is an important way to sink the county health resources and to enhance the primary medical service ability. By summarizing the reform of the policy and the practical experience, the article summarizes the current diversification of integrated reform as decentralized help management, centralized agreement hosting, loose “medical union” integration and close “medical union” integration of four models, and then analyzes the many challenges faced the integration reform, which needs to promote the integration of reform, by establishing a close “medical union”, optimizing the functions of government services and establishing the modern hospital management system.